He claimed that after hearing yelling and seeing students scattering, he sought refuge in the music room.
As police cars and fire trucks converged at the area, children were seen on camera leaving the school.
The Dallas Independent School District announced that although the school has been secured, people are advised to avoid the site.
Superintendent Stephanie Elizalde said all high school pupils were reunited with their parents and guardians.
According to her, mental health specialists will be made available and there won’t be any classes for the remainder of the week.
Elizalde stated at the briefing, “Today, as we all know, the unthinkable has happened.” “And quite frankly, this is just becoming way too familiar, and it should not be familiar.”
